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《Coal Science and Technology》 2014-01
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Research on Law of Surrounding Rock Movement and Rational Coal Pillar Width Determination in Steep Seam

WANG Jian-peng;ZHANG Jun;Faculty of Mechanics & Civil Engineering,China University of Mining and Technology( Beijing);Duerping Coal Mine,Shanxi Coking Coal Group Co. ,Ltd.;Science & Technology Management Office,North China Institute of Science & Technology;  
In order to solve the problem of unreasonable coal pillar width in Qitaihexintie Coal Mine,based on the study of regional distribution characteristics of surrounding rock deformation and failure,the numerical simulation analysis was used to study the surrounding rock deformation law and reasonable coal pillar width of steep seam. The results showed that the lower area working end face was heavily affected by surrounding rock movement,and the influence scope was 30. 5 m,stress peak was 23. 12 MPa. The different coal pillar width had great influence to roadway support,the engineering practice showed that roadway with 15 m width pillar was reasonable and feasible,maximum roof convergence was 87 mm,maximum floor heave was 231 mm and the rib deformation was 52 mm. The 15 m width pillar could effectively control the deformation of roadway.
【Fund】: 国家自然科学基金资助项目(51044009);; 中央高校基本科研业务费专项基金资助项目(3142013100);; 河北省自然科学基金资助项目(E2012508002)
【CateGory Index】: TD822.3
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